Question

which equation can you use to find the value of x?
x + 30 + 105 = 180
find the value of x.
x =
(there is a triangle image with angles 30°, 105°, and x°)

Explanation:

Step1: Recall triangle angle sum

The sum of angles in a triangle is \(180^\circ\). So the equation is \(x + 30 + 105 = 180\).

Step2: Simplify the left side

Calculate \(30 + 105 = 135\), so the equation becomes \(x + 135 = 180\).

Step3: Solve for \(x\)

Subtract \(135\) from both sides: \(x = 180 - 135\).

Step4: Calculate the result

\(180 - 135 = 45\).

Answer:

\(45\)